Internal-combustion engine.



R. B'sNAULT-PBLTERIB. NTERNAL OMBUSTION ENGINE.

APPLIUATION FILED MAY 19d?. 1,960,070. Patented Apr. 29, 1.913.

"1 SEBETSSHEET 1.

R. ESNAUL T-PELTERIE. INTERNAL GOMBUSTION ENC-INE.

APPLICATION FILED MAY 2, 19o?.

L'Y, Patented Apr. 29, 1913.

3 SHEBTS-SHtmm T/IwSSQs R. BsNAULT-PBLTERIE. INTERNAL'COMBUSTION ENGINE.

Y i n APPLICATION FILED MAY 2, 1907. 1 ,060,070.

` 3 SHEETS-SHEET 34 Patent-ed Apr. 29, 1913.

gle cam turning in the direction opposite to that of the motor shaft and at least at one sixth of the speed.

If itis assumed, for greater simplicity, that all the cylinders are in one plane (see Fig..5) it is necessary that all the cylinders operate at equal intervals in order that the Y motive couple may be as regular as possible,

and it is necessary moreover that :tor every two revolutions of'the'motor all the cylinders should operate at least once, and no more.

It the motor turns in the direction of the hands of a watch (see Fig. and the cylinders are numbered from 1 to 7 starting from the left hand, the cylinders ought to act, in order to satisfy the foregoing conditions, in

the order 1, 3, 5, 7 2, 4C, 6. The cani which turns in the opposite direction will encounter' them in the order 7, G, 5, 4, 8, 2, 1. It is necessary that when the cani shall have turned from cylinder 7 to cylinder 6, the motor shall equally have turned from cylinder 7 to cylinder 6. In thus turning it has passed by the axes ot' the cylinders 2 and 4t and in consequence has described an angle'oi' During this time the cam has described the angle It has therefore turned at one sixth of the speed of the motor and in the opposite direction. But, as in turning from cylinder 7 to cylinder 6 the motor passes by the cylinders 2 and 4f, the cam must have its bosses or cam faces equidistant (Fig. '7

showing the whole profile), that is, spaced l apart by angles of 120. When the motor turns from-cylinder 7 to cylinder 2 it describes an angle equal to and the cam which turns in the opposite direction at one sixth of the speed describes an angle equal, to

It follows from this that the distance between each two consecutive bosses or cam vfaces should be equal, as is indicated in. the

diagram for cylinders 1 and 3, namely I g glp? 2 2 that is to say 120. But in-I reality it must not be forgotten that the cylinders are divided into ltwo groups turned in relation t-o eachother through 180. This is why the cam should be doubled, the two cams being turned through 180 relatively to each '72 to each other. The rear cylinders will alsobe turned through 180 relatively to the front cylinders, and their connecting rods will work a crank turned through 180 relatively. to the crank of the three front-cylinders.

The diagram of the distribution is shown in Fig. 6. i 7

As before, if the cylindersare numberedv troni lett to right they operate Ain theorder,

1, 3, 5, 2, i-, and thel cani which turns in the,I

opposite direction in the order 5. 4, 3, 2,1.

It will be necessary then that while the cam,

is turning from cylinder to cylinder 4 the motor should turn from cylinder 5 to. cylinder It will thus have describedv an angle equal to 4 r\- 5; At,

while the cani will have only uescrlbed an angle 27? It must in consequence turn'at one fourth' of the speed of the niotor' and in the opposite direction. the cani are in this case 180"4 apart.

W'hen the motor turns from cylinder 1 tolv cylinder 5, it passes by the'axis of cylinder' 3 which will give in its turn the motive power. In arrivi-ng at this' cylinder, anA angle equal to p 2.12.5?,

but on the other "hand lthe cam 4will have turned through an angleequalto .2. a; n l 5 v and the distance between the two bosses of the cam should be that is to say 180. In this particular case' therezis also need to turn the cam for the rear cylinders through 180. in relation't'o the cam for the front cylinders, but this is useless since the bosses ot' the two cam would coincide.

It is obvious that the above remarks may The bosses or cani facesofv i above a horizontal ble in a direction reverse to the direction of the crank shaft and having two sets of peripheral cam surfaces side by side, the cam surfaces of each set being "separated at distances of 120.

4. An internal combustion engine having an uneven number of cylinders arranged in two parallel groups, the cylinders of each group being arranged to make equal angles with each other, a shaft having oppositely set cranks with whiclrkthe pistons ofV therespective groups are respectively connected, each of said two groups of cylinders being plane passed through the axis of said shaft,"'and valve mechanisms for the cylinders of the respective groups and com rising a distributing cam rotatable in a irection reverse to the direction of .thecrankshaft and having two parallel sets ofcain surfaces` coinciding angularly with the cylinders of the respective groups.

5. An internal combustion-engine having i a shaft having oppositely set cranks, an

- ripheral cam surfaces uneven number of cylihders arranged in two parallel groups each of which is above a said shaft, thevpistons of one group of cylinders being connected with one of said cranks and those of theother grou being connected with the other crank of sa1d shaft,

valve mechanism including a distributing cam rotatable in a direction reverse to the direction of the crank shaft and having peside by side and corresponding with the cylinders of the respective groups, an annular gear surface on said cam, and gearin for operating said cam from the .crank s aft and comprising a gear wheel mounted to turn and meshing with said annular gear face on the cam.

6. An internal combustion engine having a shaft having oppositely set lcranks, an uneven number of cylinders arranged in two parallel groups each ofwhich is above a horizontal plane passed through the axis of said shaft, the pistons of one group of cyl'- inders being connected with one of said cranks and those of the other group being connected with the other crank of said shaft and valve mechanism including a distributing cam rotatable in a direction reverse to the direction of the crank shaft and having peripheral cam surfaces side by side and at angles to each other and valve rods ar.

ranged for contact u surfaces.-

7. An internal combustion engine having a shafthaving oppositel set cranks, an uneven nu-mber of cylin` ers arranged in two parallel groups each of\which is above a horizontal plane passed through the axis of said shaft, the pistons of one group of cylinders having connection with one of said cranks whilethose of the other group have connection with the other crank of said shaft, and valve operating mechanism including cams having surfaces of different on said angular cam throw and rotatable in a'direction reversel to the direction of the crank shaft.

In witness whereof I have hereunto signed my name this 18th day of April 1907, in the presence of two subscribing witnesses.

ROBERT ESNAULT-PELTERIE Witnesses; g

C.v Coxn,

' GABRIEL BELLIARD. 

